Geometry Spring Semester Formulas

Mr. Eaton is crazy

Formula for Exterior angles of a regular convex polygon

360/n

Formula for interior angles of a regular convex polygon

(n-2) × 180

Midsegment of a Trapezoid Formula

(b1 + b2) / 2

Triangle Area Formula

(base × height) / 2

Area Formula Parallelogram

base × height

Trapezoid Area Formula

(b1 + b2) × height / 2

Kite Area Formula

(d1 × d2) / 2

Polygon Central Angle Formula

360/n

Regular Polygon Area Formula

(Perimeter × apothem) / 2

Circle Area Formula

πR²

Sector Area Formula

(θ/360) × πR²

Prism Lateral Area Formula

(Perimeter of base × height)

Prism Surface Area Formula

(Perimeter of base x height) + (2 × Area of base (B))

Pyramid Lateral Area Formula

(Perimeter of base × Slant height) / 2

Pyramid Surface Area Formula

(Perimeter of base x Slant height) / 2 + Area of base (B)

Cylinder Lateral Area Formula

2 × π × radius × height

Cylinder Surface Area Formula

2πRh + 2πR²

Cone Lateral Area Formula

π x radius x Slant height

Cone Surface Area Formula

(π x radius x Slant height) + (π radius²)

Sphere Surface Area Formula

4πr²

Prism Volume Formula

Area of Base(B) x height

Cylinder Volume Formula

πR²h

Pyramid Volume Formula

Bh/3

Cone Volume Formula

πR²h/3

Sphere Volume Formula

4πR³/3

Length/Length

a/b

Area/Area

a²/b²

Volume/Volume

a³/b³

Angle between two chords

a=b+c/2

Arc Length Formula

\frac{\theta}{360} 2 \pi r